Device in saw frames



Nov. 18, 1947, c. OQJOHANSSON DEVICE IN SAW FRAMES Filed Feb. 14, 1945 Fig.2.

Patented Nov. 18, 1947 DEVICE IN SAW FRAMES Carl 010v Johansson, Eskilstuna, Sweden, assignor to Leonard Johanssons Fabriks Aktiebolag, Eskilstuna, Sweden, a joint-stock company of Sweden Application February 14, 1945, Serial No. 577,741 In Sweden March 9, 1943 2 Claims.

The present invention relates to a device in saw frames with two tube portions slidable one within the other, the inner tube portion being provided with a loosely mounted ring having a tongue directed towards the outer frame portion, the said tongue being adapted to be actuated by the adjacent end of the outer frame portion in such a way that the ring is turned so as to be tightened on its frame portion, thus preventing the two frame portions from being pushed together. In such saw frames it has occurred that the end of the outer frame portion has extended so far under the tongue that it has contacted also the remaining part of the end portion of the ring facing the end of the outer frame portion and displaced the ring from the stopping position.

In order to prevent the end of the frame portion facing the ring from extending too far under the tongue at the stretching of the saw blade, the tongue is according to the invention in its point provided with an indentation which is adapted to glide up on the end of the outer frame portion and to limit th sliding of the said frame portion end under the tongue.

Part of the saw frame with the device in question is illustrated on the accompanying drawing. Fig. 1 is a plan view, Fig. 2 is a side view, and Fig. 3 is a vertical longitudinal section of the device.

According to the drawing the reference numeral l designates the inner frame portion and 2 the outer frame portion. On the inner frame portion I there is loosely mounted a ring 3 which can perform the turning movement in the plane of the saw frame required for the locking when the tongue 4 of the ring protruding towards the outer frame portion 2 is actuated by the end portion of the lastmentioned frame portion, the said end portion being preferably provided with a bulge 5. The tongue 4 is provided with an indentation 6 2 which is intended to abut against the end of th outer frame portion 2 and limit its sliding movement under the tongue.

Having now described my invention, What I claim as new and desire to secure by Letters Patent is:

1. In a device for locking telescoped inner and outer members including a tongued locking ring loosely mounted on the exposed portion of the inner member, the tongue portion of said ring bearing against the outer surface of the outer member to wedge a portion of said outer member between said inner member and said tongue to tilt said ring into locking engagement with said inner member as said members are pushed towards each other, the improvement which consists in providing an indentation at the outer end of the tongue to thereby augment the tilting and locking action of the ring.

2. A locking device as defined in claim 1 wherein at least a portion of the outer surface of said outer member is bulged for a sliding and wedging motion under the tongue portion of said locking ring, the indentation in said tongue riding up said bulge as the members are pushed towards each other.

CARL OLOV J OI-LANSSON.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PA ImNTS Number Name Date 1,265,113 Reimer et al May 7, 1918 1,679,168 OBrien July 31, 1928 1,798,568 Wagenhorst Mar. 31, 1931 2,143,177 Whyte Jan. 10, 1939 

